I get a couple dozen emails each week from people asking how much their books without an ISBN are worth. Unfortunately, the current  website is only useful for books with an ISBN. The ISBN obviously makes it easy to compare prices from multiple websites. I’m looking at ways to tackle this problem of finding the value of non-ISBN books. However, I don’t have any experience evaluating these types of books. I’d like to get in touch with a few book sellers who are knowledgeable about them and try to put something together. Please send me an email or use the Contact Form if you think that you can provide some insight.